Factor 121x^2-25

$121 x^{2} - 25$

Step 1

Rewrite $121 x^{2}$ as ${(11 x)}^{2}$ .

${(11 x)}^{2} - 25$

Step 2

Rewrite $25$ as $5^{2}$ .

${(11 x)}^{2} - 5^{2}$

Step 3

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = 11 x$ and $b = 5$ .

$(11 x + 5) (11 x - 5)$

Factor 121x^2-25

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